Can Flexible PVC be "unplastisized"? Can Flexible PVC be "unplastisized"? DirtyJ (Civil/Environmental) (OP) 5 Dec 13 13:16 Is there a process to revert Flexible PVC back to its rigid state? RE: Can Flexible PVC be "unplastisized"? Compositepro (Chemical) 5 Dec 13 13:33 That does tend to happen to vinyl automobile upholstery and dashboards over time. The plasticizer is a high boiling point oil, but it still has a vapor pressure and will slowly evaporate. High temperature, vacuum, and large surface area will accelerate the process. I don't think that this would ever be economically feasible. RE: Can Flexible PVC be "unplastisized"? Demon3 (Materials) 5 Dec 13 15:21 Potentially you could run it through an extruder and apply a really good vacuum to suck off the plasticizer. It could actually work. I know that it is possible to remove water from plastic in that way. Chris DeArmitt - PhD FRSC Plastics & Materials Consulting www.phantomplastics.com Plastic Training Seminars www.plastictraining.com RE: Can Flexible PVC be "unplastisized"? chicopee (Mechanical) 22 Jan 14 11:07 You could try to unplasticize PVC powder or granule with acetone. RE: Can Flexible PVC be "unplastisized"? chicopee (Mechanical) 26 Jan 14 14:13 I had to look at notes that I kept for four decades, we did extraction of PVC resins with methanol in the lab. Acetone was used to clean plastisol formulations from mixing bowls. RE: Can Flexible PVC be "unplastisized"? MikeHalloran (Mechanical) 31 Jan 14 19:00 Or just put it in storage and wait about ten years, and it will stiffen right up. Mike Halloran Pembroke Pines, FL, USA RE: Can Flexible PVC be "unplastisized"? Shylanel (Materials) 1 Feb 14 14:22 All the above suggestions will work but I doubt you will ever remove all of the plasticizer as they are designed to like the resin and diffusion laws apply. You could probably remove it to the point most couldn't tell there was any left but you could detect it analytically.